In order to support the way some Smart Objects work, a clear
directory join was needed in order to allow for clearing a
selection in certain circumstances.
In order to support finer-grained dependencies while
developing plugins, the Development Device Factory was added.
Update to poll meetings every 60 seconds
Add property to allow for adjusting when Join button appears
Refactor call connected event handler
Adjust text for header for sharing-only meeting
Add logic to handle waiting for host state
